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Finding the Fourth Proportional to 839,518.62, 1,259,648.94 and 440,063.88

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Solution

The fourth proportional to 839,518.62, 1,259,648.94 and 440,063.88 is: 660,290.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,518.62 : 1,259,648.94 = 440,063.88 : x
  2. Step 2: Convert to fraction form
    839,518.62/1,259,648.94 = 440,063.88/x
  3. Step 3: Cross multiply
    839,518.62x = 1,259,648.94 × 440,063.88
  4. Step 4: Simplify right side
    839,518.62x = 554,325,999,974.29
  5. Step 5: Solve for x
    x = 554,325,999,974.29/839,518.62
  6. Step 6: Final answer
    x = 660,290.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.